Wash thinai rice and moong dhal and soak it in water for an hour.
Cook it for 4 whistles with 4 cups water and salt required. 1:4 ratio.
Once its mushy and completely cooked, add the seasoning.
For seasoning, Heat oil and ghee mixture in a tadka, add cumin seeds ,peppercorns ,curry leaves, red chilly and cashew. Saute until cumin and cashew turns brown. Add to the pongal. Mix well and serve hot with sambar.